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filter is not described

woocommerce_shipping_method_add_rate filter-hook . WC 1.0

Usage

add_filter( 'woocommerce_shipping_method_add_rate', 'filter_function_name_8742', 10, 3 );
function filter_function_name_8742( $rate, $args, $that ){
	// filter...

	return $rate;
}
$rate
-
$args
-
$that
-

Where the hook is called

WC_Shipping_Method::add_rate()
woocommerce_shipping_method_add_rate
woocommerce/includes/abstracts/abstract-wc-shipping-method.php 326
$this->rates[ $args['id'] ] = apply_filters( 'woocommerce_shipping_method_add_rate', $rate, $args, $this );

Where in WP core the hook is used WooCommerce

Usage not found.